Arrastra Creek, a large 2nd order tributary to the middle Blackfoot River, flows ~13 miles through public (National Forest) and private land entering the Blackfoot River near river mile 88.8. Arrastra Creek, the largest and among the coldest Blackfoot River tributaries between Beaver Creek (rm 105.2) and Nevada Creek (rm 67.8). It is also the only stream between Poorman Creek (rm 108) and the North Fork (rm 54.1) to support a bull trout.